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Synthesis of DDQ involves cyanation of chloranil. J. Thiele and F. Günther first reported a 6-step preparation in 1906. [7] The substance did not receive interest until its potential as a dehydrogenation agent was discovered. A single-step chlorination from 2,3-dicyanohydroquinone was reported in 1965. [8]
Photolabile protecting groups As a proof of concept orthogonal deprotection is demonstrated in a photochemical transesterification by trimethylsilyldiazomethane utilizing the kinetic isotope effect: [102] Orthogonal protection Application in Photochemistry Due to this effect the quantum yield for deprotection of the right-side ester group is ...
It is also a good test for the successful deprotection of a secondary amine. Secondary amines react with chloranil to give a brown/red/orange derivative, the colour depending on the amine. In these reactions, the amine displaces chloride from the ring of the quinone.
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The Office of Federal Financial Management (OFFM) is a component of the United States Office of Management and Budget (OMB), which is part of the Executive Office of the President of the United States (EOP). The President of the United States appoints the controller, who serves as the chief officer of OFFM.
A Guide to the Project Management Body of Knowledge — Sixth Edition provides guidelines for managing individual projects and defines project management related concepts. It also describes the project management life cycle and its related processes, as well as the project life cycle. [9] and for the first time it includes an "Agile Practice ...